The Vera C. Rubin Observatory in Chile has begun the decade-long Legacy Survey of Space and Time (LSST), employing the world's largest digital camera—a 3200-megapixel car-sized device. After a year of testing, it captures an image every 30–40 seconds, scanning the southern sky to create a time-lapse record. Funded by the NSF and DOE at $800 million, the survey aims to detect everything from asteroids to distant galaxies, including unknown objects. This monumentalmonumental/ˌmɒn.jʊˈmen.təl/L3极其巨大的；具有重大意义或影响的extremely large and impressive; having great and lasting importance or effect effort will produce an unprecedentedunprecedented/ʌnˈpres.ɪ.den.tɪd/L3史无前例的；空前的never done or known before; without previous example record of the cosmos.
Each night, the facility collects 10–20 terabytes of data and issues up to seven million alerts, enabling rapid follow-up. During its first year, the LSST is expected to gather more data than all previous visible-light telescopes combined. Scientists glimpsed its power through first images released in June 2025, revealing stunning views of the Virgo galaxy cluster. Subsequently, the team evaluated these factors before declaring the survey operational, an achievement Eric Bellm called the culminationculmination/ˌkʌl.mɪˈneɪ.ʃən/L3顶点；高潮；最终结果the highest or climactic point of something, especially as attained after a long period of effort of immense collaborative effort.
The LSST's primary objectives include mapping billions of galaxies and detecting supernovae. It will also probe dark matter and dark energy, the invisible substances constituting most of the universe's mass. Scanning with six filters and revisiting patches, it captures faint details. Cosmologist Arun Kannawadi Jayaraman expressed both excitement and nervousness as the survey transitions from testing to real operations. The observatory is named after Vera C. Rubin, whose 1970s observations first indicated dark matter, now estimated at 85% of the universe's matter.
The final dataset, containing billions of objects and trillions of measurements, will be, in Phil Marshall's words, 'an absolute gold mine for science,' underscoring its potential to revolutionizerevolutionize/ˌrev.əˈluː.ʃən.aɪz/L3彻底变革；使发生革命性变化to change something radically or fundamentally astrophysics. Strategically, the observatory's capabilities position it as a critical asset for fundamental research and planetary defense, detecting near-Earth objects. The decade-long survey, costing $800 million, represents a substantial investment in humanity's understanding of the universe, with implicationsimplications/ˌɪm.plɪˈkeɪ.ʃənz/L3可能的影响或后果；含义the possible effects or results of an action or decision for future exploration and technology. This investment underscores the importance of large-scale surveys in addressing fundamental cosmic questions.
